let a = ['', '+', '-']
let j = 0
while(true) {
    j++
    let ss = ''
    for(let m=1;m<=8;m++){
        ss+=`${m}${a[Math.round(Math.random()*(a.length-1))]}`
    }
    ss+='9'


    if(eval(ss) === 100) {
        console.log(ss, eval(ss))
        console.log(j)
        break
    }
}
